Unable to send mails through zimbra but Can receive them

[WhiteRose786]

I have recently installed zimbra on my Centos 8 VPS.....I am getting a one problem.I am not able to send to other domains means When I am sending a email to my own domain its working But Unable to send to other domains like Gmail , hotmail etc But I am able to receive email from other domain.....Can Anyone help me with this problem ?

[ianw1974]

Post the error messages from the log files. If the email cannot be sent it will be bounced for a particular reason. So check /var/log/mail.log or /var/log/maillog if RHEL/CentOS, also /var/log/zimbra.log. Without errors it's impossible to see what the problem is.